化学合成法制备锌镍电池负极材料锌酸钙  

Preparation of calcium zincate as negative electrode material for Ni/Zn battery by chemo-synthesis method

作　　者：杨占红[1] 王升威[1] 曾利辉[2] 王小花[1] 刘东任[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083 [2]西北有色金属研究院,陕西西安710016

出　　处：《中南大学学报（自然科学版）》2008年第5期918-922,共5页Journal of Central South University:Science and Technology

基　　金：国家科技支撑计划资助项目(2006BAE03B03)

摘　　要：以摩尔比为1:2.02的Ca(OH)2和ZnO为原料,通过化学合成法制备锌酸钙。采用X射线衍射、热重分析、粒度分析、循环伏安以及模拟电池的充放电等方法,对制备的样品进行表征。研究结果表明:所制得锌酸钙样品的化学组成为Ca(OH)2.2Zn(OH)2.2H2O;样品的颗粒粒径分布均匀,平均粒径为23.18μm;以该锌酸钙为负极活性物质的模拟锌镍电池具有很高的放电平台,达到1.686 V;制得的锌酸钙的实际比容量为195.8 mA.h/g,达到了理论比容量的56.4%。Calcium zincate was prepared by chemo-synthesis method from Ca（OH）2 and ZnO with the molar ratio of Ca（OH）2 to ZnO of 1：2.02. The sample was characterized by XRD, TGA, particle size analysis, cyclic voltammetry and charge-discharge test of simulated Ni/Zn battery. The results show that the chemical composition of sample is Ca（OH）2·2Zn（OH）2·2H2O. The sample consists of well dispersed particles with diameter about 23.18 μm. The simulated Ni/Zn battery has very high discharge plateau of 1.686 V, as well as a discharge capacity of 195.8 mA.h/g, which approaches 56.4% of the theoretical specific capacity.

关 键 词：化学合成法 放电平台 锌酸钙 锌镍电池 循环伏安法 

分 类 号：TM912.2[电气工程—电力电子与电力传动]